trade on something
phrasal verb with trade verb uk/treɪd/ us/treɪd/
（为谋私利）利用
to use something, especially a characteristic, for your own advantage and usually in an unfair way
People are always trading on his generosity. 人们总是利用他的慷慨。
This kind of advertising trades on people's fears. 这种广告利用了人们的恐惧心理。
He trades on his good looks. 他利用自己的英俊相貌来谋取便利。